Forth Korean l10n work for release-1.19

- Fix ko glossary managed service title (#24621)
- Translate reference/glossary/service-broker.md in Korean (#24632)
- Translate reference/command-line-tools-reference/kubelet-authentication-authorization.md into korean (#24623)
- Update outdated files in the dev-1.19-ko.4 branch (#24622)
- Translate setup/production-environment/tools/kubeadm/self-hosting/ into Korean (#24655)
- Translate reference/kubectl/kubectl.md into Korean (#24482)
- docs: fix typo (#24713)
- Translate connecting-frontend-backend to Korean (#24422)
- Translate reference/kubectl/conventions.md into Korean (#24614)
- Translate k8s 1.19 relaese note in korean (#24633)

Co-authored-by: seokho-son <shsongist@gmail.com>
Co-authored-by: santachopa <santachopa@naver.com>
Co-authored-by: kosehy@gmail.com <kosehy@gmail.com>
Co-authored-by: Jerry Park <jaehwa@gmail.com>
Co-authored-by: markruler <csu0414@gmail.com>
Co-authored-by: noel <neutiyoo@gmail.com>
Co-authored-by: coolguyhong <podolsmith@naver.com>
Co-authored-by: chhanz <han0495@gmail.com>
Co-authored-by: bluefriday <bluefriday86@gmail.com>

content/ko/docs/tasks/administer-cluster/network-policy-provider/cilium-network-policy.md

@@ -63,7 +63,7 @@ deployment.apps/cilium-operator created
 ```
 
 시작하기 안내서의 나머지 부분은 예제 애플리케이션을 이용하여
-L3/L4(예, IP 주소 + 포트) 모두의 보안 정책 뿐만 아니라 L7(예, HTTP)의 보안 정책을
+L3/L4(예, IP 주소 + 포트) 모두의 보안 정책뿐만 아니라 L7(예, HTTP)의 보안 정책을
 적용하는 방법을 설명한다.
 
 ## 실리움을 실 서비스 용도로 배포하기